... battery ) are widely used for the following locomotive and light train applications.CHANGHONG Locomotive engine starting Nickel cadmium Battery ... of the end-user. 1) Emergency power supply for control and light. Reference:KPH80 KPL125, KPL135, KPL165, KPM120, KPL300-(3 ... locomotive . Reference:KPL100, KPH120 , KPX180 etc.4) Signal control on the ground for track traffic. Reference: KPM100, KPM200 etc ...